Frequently purchased together

Specifically designed to perform in the sub-zero temperatures that alpine climbers regularly endure, the Thorlos Thick Cushion Wool/Thor Lon Mountaineering Sock provides big warmth without losing the ability to wick away moisture. The 100% worsted wool toe keeps frostbite away, and thick cushioning underfoot helps to absorb the shock of rough terrain. It's no surprise that this sock is the go-to choice of guides at the American Alpine Institute.

Blend of worsted wool and Thor Lon is specifically designed to provide warmth, moisture management, and blister protection in sub-zero temperatures

100% wool toe area increases warmth where it's most needed

Thick cushioning in the ball and heel helps to absorb impacts

Medium cushion in the ankle, shin, and arch increases comfort in tight-fitting boots